US1702476A - Jar cover - Google Patents

Description

P. P. KUCERA J AR COVER Filed July 29, 1924 UNITED! vSTATES PATENT oFFicE.

PETER P. KUGE RA, 0F PITTSBURGH, PENNSYLVANIA.

f JAR COVER.

Application mea July 29,

This invention relates to jars or containers and more particularly to an improved form of closure or cover therefor.

J ars used for preserving are generally made of glass for ilar purposes fruit and for simthe reason that it neither affects the fruit or fruit juices nor is it affected by them. It is also desirable to have glass covers for the jars for the same reasons but this has hitherto been impossible for the reason that there has been no reliable way of securing a ,glasscover to` the jar so as to joint, while at -insurethe necessary air tight the same time providing a device which can be used repeatedly without lessening its efciency.

he well known Mason jar which has been universally used for the purposes set forth is provided with a metal threaded iiange for cover having a screw securing it to threads formed on the jar and is also provided with a glass liner in the top so coming in contact with jar. This form of cover is as to prevent metal the contents of the not only relatively expensive but it can be used but once for all practical purposes,

for the reason that the contents of the jar eventually work their way back of the glass liner and become a possible source of contamination of contents, if the cover is used a second time.

An object an improved of this invention is to provide form of cover for jars or containei's which may conveniently be made of glass and which is provided with simple means for securing it in place on a jar or container.

A further object is to provide a device of the type set forth which can be easily cleaned and which may therefore be used repeatedly. A still further object is to provide a glass cover for jars having a simple means for securing it in place and which is cheap to manufacture and positive struction.

These and other objects which parent to those skilled are attained by means and rugged in conwill be apin this particular art of this invention one embodiment of which is shown in the accompanying drawings, in 'which Figure 1 is a vertical section through a jar provided with a top constructed .in acc ordance with this invention, Fig. 2 is a similar view of the top removed from the jar, tion of a jar showing th Fig. 3 is a side elevae securing lugs formed 1924. Serial No. 728,855.

thereon, Fig. 4 is a bottom plan view, partially in section, of the cover and Fig. 5 is a top plan view of the jar.

The particular embodiment of this invention, chosen for the purposes'of illustration', includes a jar which may, for example, be similar to al Mason jar, except that spaced lugs are provided at the top thereof instead of the usual screw threads. A cover or top is provided which has adownwardly extending, internally grooved flange which surrounds the top of the jar. A retaining means, such as the spring illustrated, is inserted in the groove and is adapted to engage the lugs of the jar for securely holding thek cover in place thereof.

Thedrawings'illustrate a jar 6 provided with a plurality of cover securing lugs 7 which are spaced around the top thereof. The cover 8 is preferably made of glassand has a downwardly extending flange 9,-the bottom edge 10-of which is turned inwardly so as to provide an internal groove 11 adapted to receive a` securing means which is illustrated as a snap spring 12. This spring 12 is provided with arched lug engaging sections 13 which are separated by outwardly extending cover-engaging sections 14 through which the lugs 7 of the container are adapted to pass upon application of the cover to the jar. The cover engaging sections 14 seat on the lower surface 14 of the groove 11.- The luofk engaging sections 13 extend inwardly be- `arched as shown in Fig. 2 so as to be flexed with the lugs 7 when the cover the resulting in the cover securely into position with a k The spring 12 is introduced into the groove 11 by flexing the spring so as to reduce its diameter suiiciently to permit it to pass within thelower edge of the groove after which it is snapped in place with its ends in position on opposite sides of the lug 15. Rotation of the spring 12 with relation to the cover 8 is prevented by means of a lug 15 which as stated is adapted to lie between the ends of the spring 12. The outer edge of the cover 8 is provided with a series of corrugations 16 to provide a gripping surface. A gasket 17 of any desired material, such asrubber, may be provided to insure an air tight oint between the jar and the cover.

by engagement is in place on being pressed yielding pressure.

However, the present type of securing means which permits the use of an all glass cover provides a structure in which the contacting surfaces of the cover and jar may be ground or lapped so as to provide a joint in which it is not necessary to use such a liner unless it is especially desired.

The cover is applied to the jar by passing Lh'e flange 9 downwardly around the upper edge or lip of the jar, after the cover is turned to such a position that the lugs 7 will pass through the outwardly extended sections 14 of the spring 12. The cover is then turned to move the lug engaging sections 13 of the spring under the surfaces 18 of the lugs 7 which surfaces are curved so as to flex the spring 12 between the sections 14 and thereby yieldingly hold the cover in place on the `ar.

Iri'preserving fruit the jars with their contents are heated and steam and air is driven off. In order to prevent air from entering the jar after the heating operation it is necessary with the Mason jar to tighten the cover in place while the jar is still hot at the end of the heating operation. The present invention eliminates any necessity for handling the heated jars. The steam and moisture will lift the cover 8 against the tension of the spring 1 2 suiiiciently to allow the former to escape after which the spring 12 again returns the cover to an air 'tight seat on the jar, auto matically preventing the admission of any air to the partially evacuated jar. The cover is held to its seat with a resilient pressure which not only insures an air tight joint but materially reduces breakage resulting from a jar or blow. The spring 12 can be easily removed or renewed, if'necessary. The entire device can be cleaned as frequently as desired and may be used repeatedly.

Although I have described the use of lugs 7 for securing the cover in place other means,`

such as broken threads or grooves, may obviously be used in place of the lugs.

I claim:

1. The combination with a jar having lugs adjacent the top thereof, of a cover provided with a depending internally grooved flange adapted to surround the top of said jar, a spring seated in the groove of said cover and provided with yielding upwardly arched lug engaging sections positioned inwardly of said groove beyond the confines thereof for se.- curing said cover to said jar and holding it in engagement therewith.

2. The combination with a jar of a cover therefor provided with an internal groove. a spring` seated in said groove and provided with vertically arched sections formed in spaced relation to each other, said sections being positioned beyond the confines of said groove and means on said jar for engaging said sections so as to hold said cover in place.

3. The combination with a jar of a cover therefor provided with a depending internat ly grooved fiange, a wire seated in said groove provided with upwardly extending sections formed in spaced relation to each other7 said sections being positioned beyond the conncs of said groove-and means on said jar for engaging said upwardly extending sections so as to hold said cover in place with a downward pressure.

In testimony whereof, I have hereunto subscribed my narne this 25th day of July, 1924.

PETER P. KUCERA.

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